List all tournaments or create a new tournament.

GET /api/v1/tournaments?format=api&ordering=min_ranking&page=3931
HTTP 200 OK
Allow: GET, POST, HEAD, OPTIONS
Content-Type: application/json
Vary: Accept

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            "description": "Since there is a new rating system, it's time to play more games and get your rank sorted out. I'm setting up three tournaments for each playing level. Have fun everyone!",
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